just wondering what these do and what the benifits are of them, do they increase hp or are they just a cosmetic bolt on?

 

They do supposedly add hp, but it's not enough to really notice so i guess you could call it a cosmetic bolt-on.

 

iv heard that some people feel it and some dont, every one has a different idea

 

I think March claims about 25 hp increase but When i put mine on i couldnt tell, but thats cuz I never had stock pulleys to begin with. I think the real gain is if you delete the smog pump or the a.c. compressor, that'll definatly give you some more hp.

 

i lost .3 of my et. gave me a better acceleration. mine are aluminum udp's, but i got them used i would not get them new. too much money

 

thanks for the feedback fellas, i think im gonna stay with what i have seeing that i have deleted smog power steering as well as ac, so basicly im runin an alternator and water pump, the must haves